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$NetBSD: patch-ab,v 1.5.16.1 2004/12/13 18:03:27 salo Exp $
--- Imlib/load.c.orig 2004-09-21 02:23:20.000000000 +0200
+++ Imlib/load.c 2004-12-10 09:58:18.000000000 +0100
@@ -4,6 +4,8 @@
#include "Imlib_private.h"
#include <setjmp.h>
+#define G_MAXINT ((int) 0x7fffffff)
+
/* Split the ID - damages input */
static char *
@@ -41,13 +43,17 @@
/*
* Make sure we don't wrap on our memory allocations
+ * we check G_MAXINT/4 because rend.c malloc's w * h * bpp
+ * + 3 is safety margin
*/
void * _imlib_malloc_image(unsigned int w, unsigned int h)
{
- if( w > 32767 || h > 32767)
+ if (w <= 0 || w > 32767 ||
+ h <= 0 || h > 32767 ||
+ h >= (G_MAXINT/4 - 1) / w)
return NULL;
- return malloc(w * h * 3);
+ return malloc(w * h * 3 + 3);
}
#ifdef HAVE_LIBJPEG
@@ -254,7 +260,8 @@
png_read_image(png_ptr, lines);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
ptr = data;
- if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ if (color_type == PNG_COLOR_TYPE_GRAY
+ || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
for (y = 0; y < *h; y++)
{
@@ -279,6 +286,7 @@
}
}
}
+#if 0
else if (color_type == PNG_COLOR_TYPE_GRAY)
{
for (y = 0; y < *h; y++)
@@ -294,6 +302,7 @@
}
}
}
+#endif
else
{
for (y = 0; y < *h; y++)
@@ -360,7 +369,9 @@
npix = ww * hh;
*w = (int)ww;
*h = (int)hh;
- if(ww > 32767 || hh > 32767)
+ if (ww <= 0 || ww > 32767 ||
+ hh <= 0 || hh > 32767 ||
+ hh >= (G_MAXINT/sizeof(uint32)) / ww)
{
TIFFClose(tif);
return NULL;
@@ -463,7 +474,7 @@
}
*w = gif->Image.Width;
*h = gif->Image.Height;
- if (*h > 32767 || *w > 32767)
+ if (*h <= 0 || *h > 32767 || *w <= 0 || *w > 32767)
{
return NULL;
}
@@ -1000,7 +1011,12 @@
comment = 0;
quote = 0;
context = 0;
+ memset(lookup, 0, sizeof(lookup));
+
line = malloc(lsz);
+ if (!line)
+ return NULL;
+
while (!done)
{
pc = c;
@@ -1029,25 +1045,25 @@
{
/* Header */
sscanf(line, "%i %i %i %i", w, h, &ncolors, &cpp);
- if (ncolors > 32766)
+ if (ncolors <= 0 || ncolors > 32766)
{
fprintf(stderr, "IMLIB ERROR: XPM files wth colors > 32766 not supported\n");
free(line);
return NULL;
}
- if (cpp > 5)
+ if (cpp <= 0 || cpp > 5)
{
fprintf(stderr, "IMLIB ERROR: XPM files with characters per pixel > 5 not supported\n");
free(line);
return NULL;
}
- if (*w > 32767)
+ if (*w <= 0 || *w > 32767)
{
fprintf(stderr, "IMLIB ERROR: Image width > 32767 pixels for file\n");
free(line);
return NULL;
}
- if (*h > 32767)
+ if (*h <= 0 || *h > 32767)
{
fprintf(stderr, "IMLIB ERROR: Image height > 32767 pixels for file\n");
free(line);
@@ -1080,11 +1096,13 @@
{
int slen;
int hascolor, iscolor;
+ int space;
iscolor = 0;
hascolor = 0;
tok[0] = 0;
col[0] = 0;
+ space = sizeof(col) - 1;
s[0] = 0;
len = strlen(line);
strncpy(cmap[j].str, line, cpp);
@@ -1107,10 +1125,10 @@
{
if (k >= len)
{
- if (col[0])
- strcat(col, " ");
- if (strlen(col) + strlen(s) < sizeof(col))
- strcat(col, s);
+ if (col[0] && space > 0)
+ strcat(col, " "), space -= 1;
+ if (slen <= space)
+ strcat(col, s), space -= slen;
}
if (col[0])
{
@@ -1140,14 +1158,17 @@
}
}
}
+ if (slen < sizeof(tok));
strcpy(tok, s);
col[0] = 0;
+ space = sizeof(col) - 1;
}
else
{
- if (col[0])
- strcat(col, " ");
- strcat(col, s);
+ if (col[0] && space > 0)
+ strcat(col, " "), space -=1;
+ if (slen <= space)
+ strcat(col, s), space -= slen;
}
}
}
@@ -1376,12 +1397,12 @@
sscanf(s, "%i %i", w, h);
a = *w;
b = *h;
- if (a > 32767)
+ if (a <= 0 || a > 32767)
{
fprintf(stderr, "IMLIB ERROR: Image width > 32767 pixels for file\n");
return NULL;
}
- if (b > 32767)
+ if (b <= 0 || b > 32767)
{
fprintf(stderr, "IMLIB ERROR: Image height > 32767 pixels for file\n");
return NULL;
|
